Maritalk (by Maritaca AI) is a Brazilian AI provider specializing in Portuguese language models (Sabiá family). It offers an OpenAI-compatible API with inference hosted in Brazil for data sovereignty, featuring a daily free tier for chat and competitive PAYG token rates for the Sabiá-4 flagship model.

No public free-tier information found (researched 2026-08-29).

MegaNova AI is a comprehensive AI API aggregator and infrastructure provider, offering access to 200+ models including GPT-5.6, Claude 4, and proprietary Manta models. It features a tiered free quota system based on account status and spend, plus OpenAI-compatible serverless and dedicated GPU endpoints.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Meta Model API (developer.meta.com) is the official hosted inference service for Llama and Muse models. It provides OpenAI- and Anthropic-compatible endpoints with pay-as-you-go pricing for frontier models like Muse Spark and specialized models for transcription and reasoning.

No public free-tier information found (researched 2026-08-29).

Microsand AI is an AI infrastructure provider that appears to be transitioning or offline as of September 2026. Official domains return errors or lack public-facing documentation, with no verifiable pricing or model availability found.

Site unreachable at research time: TLS handshake via Cloudflare completes but no HTTP response on ports 80/443; searches found nothing on microsand.ai as an API provider.

Microsoft 365 Copilot (BizChat) — enterprise/business Copilot web experience. Unofficial browser/cookie integration of a licensed business service.

No free tier — pay-as-you-go only.

Microsoft Copilot (copilot.microsoft.com) — free consumer Copilot web app with GPT-class chat, web grounding and image generation. Unofficial browser/cookie integration.

A free tier is available; the exact credit value is not quantified.

Microsoft Designer (designer.microsoft.com) is Microsoft's free AI design/image-generation web app (DALL-E based) for personal Microsoft accounts. Free users get a limited number of fast generations (boosts) - historically 15/day, with later region/account-specific limits reported (~60/month). This route is an unofficial, reverse-engineered web integration that captures the short-lived Bearer access_token from the DallE.ashx GetDallEImagesCogSci request; tokens expire quickly and must be recaptured.

Free personal-account boosts only (no credit currency documented).

MiniMax China (minimaxi.com) is the domestic-facing platform for MiniMax's foundation models. It mirrors the global platform's model offering and OpenAI-compatible API but optimizes for mainland China compliance and billing workflows.

No public free-tier information found (researched 2026-08-29).

MiniMax (minimax.io) is a leading Chinese AI unicorn offering a multi-modal foundation model API. Its platform provides OpenAI-compatible access to the M3 and M2.7 model families, with a mix of monthly subscription plans (Plus/Max/Ultra) and permanent 50% discounts on pay-as-you-go token rates.

No public free-tier information found (researched 2026-08-29).

Mixedbread AI is a specialized provider of knowledge-retrieval models and agents. Its platform offers an OpenAI-compatible API for its 'Toast' agent models, alongside managed search and indexing services billed by content tokens. It features a $5 one-time free credit for new users.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Mixlayer is an AI API router and aggregator (mixlayer.com) offering transparent pay-as-you-go pricing for frontier models like GLM-5.3 and Qwen 3.5. It provides a free tier for small models like Qwen 3.5 4B and dedicated GPU hosting (H100/H200) billed by the hour.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Modeloc (modeloc.com) is an evaluation and compute-sharing platform for LLM relays. It features a 'compute pool' where users can share spare model quota to earn credits or spend credits to call pooled models, integrated with a trust-score leaderboard.

Compute-pool swap: deposit your own account quota, billed by usage; guests get free model-consistency checks only. Referral grants both sides ~100K compute (~$10) one-off — not a public free API tier.

MonsterAPI (monsterapi.ai) was an AI compute and model deployment platform. The service permanently shuttered operations on June 30, 2026, and its domains are no longer active. Details were checked against the provider's own page at www.crunchbase.com.

No free tier — the source marks this service as deprecated/discontinued.

Morph (morphllm.com) is an AI provider focusing on agentic coding models. Its API offers high-speed code editing and search via proprietary models (Compact, Reflexes) and optimized frontier models (GLM, Kimi), with a limited free tier of 200 requests per month.

Free tier: 250K credits/month, $0

Muse Code is Meta's specialized AI coding environment and agent service, built on the Meta Model API. It provides a terminal-based interface for code generation and transformation, featuring both a monthly subscription plan for high usage and credit-based PAYG options via Muse Spark.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Meta AI web (meta.ai) is Meta's official free consumer assistant, powered by the Muse Spark family (hosted multimodal reasoning models; current web model is Muse Spark 1.3 per Meta AI developer posts). Free to use with a Meta account, no consumer subscription. This route is an unofficial web integration using the ecto_1_sess cookie plus a short-lived ecto1 WebSocket auth token captured from the meta.ai clippy endpoint.

A free tier is available; the exact credit value is not quantified.

NVIDIA NIM (Build) is NVIDIA's official hosted model-inference service, providing API access to over 100 frontier open-source models (Llama 3.3, Nemotron, DeepSeek). It features a permanent free tier with a 40 RPM limit, authenticated via a standard API key and accessible through an OpenAI-compatible endpoint.

Permanent free tier: API key at signup, no card, no trial countdown; ~40 RPM (200 RPM on request). Historically 1000 credits (+4000 enterprise email) but users report credits expiring unused, so not counted as value.

Naga.ac is a unified AI aggregator providing access to over 240 models via one OpenAI-compatible API. It offers a free tier with 100 requests per day and a pay-as-you-go model with competitive rates, occasionally lower than direct provider pricing for select models.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

NanoGPT (nano-gpt.com) is a large-scale AI API aggregator providing access to 1,000+ models with strict 'list price' pay-as-you-go billing. It supports OpenAI-compatible endpoints for text, image, and video models, adding a flat 5% fee only for opt-in features like BYOK or pinned providers.

No public free-tier information found (researched 2026-08-29).

NaraRouter (bynara.id) is a regional AI relay providing generous free token allowances (up to 7M tokens/day) for students and hobbyists. It supports an OpenAI-compatible API and Google login, resetting quotas daily at 07:00 WIB.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Naver CLOVA Studio is a hyperscale AI service platform using the HyperCLOVA X model. It provides APIs for text generation, chat, and specialized tuning, primarily serving the Korean language market via Naver Cloud Platform.

No public free-tier information found (researched 2026-08-29).

NavyAI (api.navy) is a unified AI API gateway providing access to 150+ models through flat-rate subscription plans with daily token quotas. It offers an OpenAI-compatible interface, 'Login with Navy' OAuth for BYOP workflows, and plans ranging from a basic free tier to high-volume 'Apex' tiers.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

NexusVAI is a multi-model API platform providing a unified, OpenAI-compatible endpoint for frontier LLMs. It features a developer-centric playground (CancriCode) and offers pay-as-you-go access to a broad range of open and proprietary models with an emphasis on ease of integration.

No public free-tier information found (researched 2026-08-28).

Nous Research is an AI research lab offering the Hermes family of models via the Nous Portal. It provides an OpenAI-compatible endpoint for pay-as-you-go inference with no complex configuration required.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.